<!DOCTYPE html>
<html>
<head>
<title>Kanban Board</title>
<meta name="description" content="An interactive Kanban board editor, a visual control used for organizing work items." />
<!-- Copyright 1998-2016 by Northwoods Software Corporation. -->
<meta charset="UTF-8">
<script src="go.js"></script>
<link href='https://fonts.googleapis.com/css?family=Lato:300,400,700' rel='stylesheet' type='text/css'>
<link href="../assets/css/goSamples.css" rel="stylesheet" type="text/css" />  <!-- you don't need to use this -->
<script src="goSamples.js"></script>  <!-- this is only for the GoJS Samples framework -->
<script id="code">
  // For the layout
  var MINLENGTH = 200;  // this controls the minimum length of any swimlane
  var MINBREADTH = 100;  // this controls the minimum breadth of any non-collapsed swimlane

  // some shared functions

  // this is called after nodes have been moved
  function relayoutDiagram() {
    myDiagram.selection.each(function(n) { n.invalidateLayout(); });
    myDiagram.layoutDiagram();
  }

  // compute the minimum size of the whole diagram needed to hold all of the Lane Groups
  function computeMinPoolSize() {
    var len = MINLENGTH;
    myDiagram.findTopLevelGroups().each(function(lane) {
      var holder = lane.placeholder;
      if (holder !== null) {
        var sz = holder.actualBounds;
        len = Math.max(len, sz.height);
      }
      var box = lane.selectionObject;
      // naturalBounds instead of actualBounds to disregard the shape's stroke width
      len = Math.max(len, box.naturalBounds.height);
    });
    return new go.Size(NaN, len);
  }

  // compute the minimum size for a particular Lane Group
  function computeLaneSize(lane) {
    // assert(lane instanceof go.Group);
    var sz = computeMinLaneSize(lane);
    if (lane.isSubGraphExpanded) {
      var holder = lane.placeholder;
      if (holder !== null) {
        var hsz = holder.actualBounds;
        sz.width = Math.max(sz.width, hsz.width);
      }
    }
    // minimum breadth needs to be big enough to hold the header
    var hdr = lane.findObject("HEADER");
    if (hdr !== null) sz.width = Math.max(sz.width, hdr.actualBounds.width);
    return sz;
  }

  // determine the minimum size of a Lane Group, even if collapsed
  function computeMinLaneSize(lane) {
    if (!lane.isSubGraphExpanded) return new go.Size(1, MINLENGTH);
    return new go.Size(MINBREADTH, MINLENGTH);
  }


  // define a custom grid layout that makes sure the length of each lane is the same
  // and that each lane is broad enough to hold its subgraph
  function PoolLayout() {
    go.GridLayout.call(this);
    this.cellSize = new go.Size(1, 1);
    this.wrappingColumn = Infinity;
    this.wrappingWidth = Infinity;
    this.spacing = new go.Size(0, 0);
    this.alignment = go.GridLayout.Position;
  }
  go.Diagram.inherit(PoolLayout, go.GridLayout);

  /** @override */
  PoolLayout.prototype.doLayout = function(coll) {
    var diagram = this.diagram;
    if (diagram === null) return;
    diagram.startTransaction("PoolLayout");
    // make sure all of the Group Shapes are big enough
    var minsize = computeMinPoolSize();
    diagram.findTopLevelGroups().each(function(lane) {
      if (!(lane instanceof go.Group)) return;
      var shape = lane.selectionObject;
      if (shape !== null) {  // change the desiredSize to be big enough in both directions
        var sz = computeLaneSize(lane);
        shape.width = (!isNaN(shape.width)) ? Math.max(shape.width, sz.width) : sz.width;
        shape.height = (isNaN(shape.height) ? minsize.height : Math.max(shape.height, minsize.height));
        var cell = lane.resizeCellSize;
        if (!isNaN(shape.width) && !isNaN(cell.width) && cell.width > 0) shape.width = Math.ceil(shape.width / cell.width) * cell.width;
        if (!isNaN(shape.height) && !isNaN(cell.height) && cell.height > 0) shape.height = Math.ceil(shape.height / cell.height) * cell.height;
      }
    });
    // now do all of the usual stuff, according to whatever properties have been set on this GridLayout
    go.GridLayout.prototype.doLayout.call(this, coll);
    diagram.commitTransaction("PoolLayout");
  };
  // end PoolLayout class


  function init() {
    if (window.goSamples) goSamples();  // init for these samples -- you don't need to call this
    var $ = go.GraphObject.make;

    myDiagram =
      $(go.Diagram, "myDiagramDiv",
        {
          // start everything in the middle of the viewport
          contentAlignment: go.Spot.TopCenter,
          // use a simple layout to stack the top-level Groups next to each other
          layout: $(PoolLayout),
          // disallow nodes to be dragged to the diagram's background
          mouseDrop: function(e) {
            e.diagram.currentTool.doCancel();
          },
          // a clipboard copied node is pasted into the original node's group (i.e. lane).
          "commandHandler.copiesGroupKey": true,
          // automatically re-layout the swim lanes after dragging the selection
          "SelectionMoved": relayoutDiagram,  // this DiagramEvent listener is
          "SelectionCopied": relayoutDiagram, // defined above
          "animationManager.isEnabled": false,
          "undoManager.isEnabled": true
        });

    // Customize the dragging tool:
    // When dragging a Node set its opacity to 0.7 and move it to the foreground layer
    myDiagram.toolManager.draggingTool.doActivate = function() {
      go.DraggingTool.prototype.doActivate.call(this);
      this.currentPart.opacity = 0.7;
      this.currentPart.layerName = "Foreground";
    }
    myDiagram.toolManager.draggingTool.doDeactivate = function() {
      this.currentPart.opacity = 1;
      this.currentPart.layerName = "";
      go.DraggingTool.prototype.doDeactivate.call(this);
    }

    // There are only two note colors by default, blue and red, but you could add more here:
    var noteColors = ['#009CCC', '#CC293D', '#FFD700'];
    function getNoteColor(num) {
      return noteColors[Math.min(num, noteColors.length - 1)];
    }

    myDiagram.nodeTemplate =
      $(go.Node, "Horizontal",
        new go.Binding("location", "loc", go.Point.parse).makeTwoWay(go.Point.stringify),
        $(go.Shape, "Rectangle", {
            fill: '#009CCC', strokeWidth: 1, stroke: '#009CCC',
            width: 6, stretch: go.GraphObject.Vertical, alignment: go.Spot.Left,
            // if a user clicks the colored portion of a node, cycle through colors
            click: function (e, obj) {
                myDiagram.startTransaction("Update node color");
                var newColor = parseInt(obj.part.data.color) + 1;
                if (newColor > noteColors.length-1) newColor = 0;
                obj.part.data.color = newColor;
                obj.part.updateTargetBindings("color");
                myDiagram.commitTransaction("Update node color");
            }
          },
          new go.Binding("fill", "color", getNoteColor),
          new go.Binding("stroke", "color", getNoteColor)
        ),
        $(go.Panel, "Auto",
          $(go.Shape, "Rectangle", { fill: "white", stroke: '#CCCCCC' }),
          $(go.Panel, "Table",
            { width: 130, minSize: new go.Size(NaN, 50) },
            $(go.TextBlock,
              {
                name: 'TEXT',
                margin: 6, font: '11px Lato, sans-serif', editable: true,
                stroke: "#000", maxSize: new go.Size(130, NaN),
                alignment: go.Spot.TopLeft
              },
              new go.Binding("text", "text").makeTwoWay())
          )
        )
      );

    // unmovable node that acts as a button
    myDiagram.nodeTemplateMap.add('newbutton',
      $(go.Node, "Horizontal",
        {
          selectable: false,
          click: function(e, node) {
            myDiagram.startTransaction('add node');
            var newdata = { group:"Problems", loc:"0 50", text: "New item " + node.containingGroup.memberParts.count, color: 0 };
            myDiagram.model.addNodeData(newdata);
            myDiagram.commitTransaction('add node');
            var node = myDiagram.findNodeForData(newdata);
            myDiagram.select(node);
            myDiagram.commandHandler.editTextBlock();
          },
          background: 'white'
        },
        $(go.Panel, "Auto",
          $(go.Shape, "Rectangle", { strokeWidth: 0, stroke: null, fill: '#6FB583' }),
          $(go.Shape, "PlusLine", { margin: 6, strokeWidth: 2, width: 12, height: 12, stroke: 'white', background: '#6FB583' })
        ),
        $(go.TextBlock, "New item", { font: '10px Lato, sans-serif', margin: 6,  })
      )
    );

    // While dragging, highlight the dragged-over group
    function highlightGroup(grp, show) {
      if (show) {
        var part = myDiagram.toolManager.draggingTool.currentPart;
        if (part.containingGroup !== grp) {
          grp.isHighlighted = true;
          return;
        }
      }
      grp.isHighlighted = false;
    }

    myDiagram.groupTemplate =
      $(go.Group, "Vertical",
        {
          copyable: false,
          movable: false,
          deletable: false,
          selectionAdorned: false,
          selectionObjectName: "SHAPE", // even though its not selectable, this is used in the layout
          layerName: "Background",  // all lanes are always behind all nodes and links
          layout: $(go.GridLayout,  // automatically lay out the lane's subgraph
                    {
                      wrappingColumn: 1,
                      cellSize: new go.Size(1, 1),
                      spacing: new go.Size(5, 5),
                      alignment: go.GridLayout.Position,
                      comparer: function(a, b) {  // can re-order tasks within a lane
                        var ay = a.location.y;
                        var by = b.location.y;
                        if (isNaN(ay) || isNaN(by)) return 0;
                        if (ay < by) return -1;
                        if (ay > by) return 1;
                        return 0;
                      }
                    }),
          computesBoundsAfterDrag: true,  // needed to prevent recomputing Group.placeholder bounds too soon
          handlesDragDropForMembers: true,  // don't need to define handlers on member Nodes and Links
          mouseDragEnter: function(e, grp, prev) { highlightGroup(grp, true); },
          mouseDragLeave: function(e, grp, next) { highlightGroup(grp, false); },
          mouseDrop: function(e, grp) {  // dropping a copy of some Nodes and Links onto this Group adds them to this Group
            // don't allow drag-and-dropping a mix of regular Nodes and Groups
            if (e.diagram.selection.all(function(n) { return !(n instanceof go.Group); })) {
              var ok = grp.addMembers(grp.diagram.selection, true);
              if (!ok) grp.diagram.currentTool.doCancel();
            }
          },
          subGraphExpandedChanged: function(grp) {
            var shp = grp.selectionObject;
            if (grp.diagram.undoManager.isUndoingRedoing) return;
            if (grp.isSubGraphExpanded) {
              shp.width = grp._savedBreadth;
            } else {
              grp._savedBreadth = shp.width;
              shp.width = NaN;
            }
          }
        },
        new go.Binding("location", "loc", go.Point.parse).makeTwoWay(go.Point.stringify),
        new go.Binding("isSubGraphExpanded", "expanded").makeTwoWay(),
        // the lane header consisting of a TextBlock and an expander button
        $(go.Panel, "Horizontal",
          { name: "HEADER",
            angle: 0,  // maybe rotate the header to read sideways going up
            alignment: go.Spot.Left },
          $("SubGraphExpanderButton", { margin: 5 }),  // this remains always visible
          $(go.Panel, "Horizontal",  // this is hidden when the swimlane is collapsed
            new go.Binding("visible", "isSubGraphExpanded").ofObject(),
            $(go.TextBlock,  // the lane label
              { font: "15px Lato, sans-serif", editable: true, margin: new go.Margin(2, 0, 0, 0) },
              new go.Binding("text", "text").makeTwoWay())
          )
        ),  // end Horizontal Panel
        $(go.Panel, "Auto",  // the lane consisting of a background Shape and a Placeholder representing the subgraph
          $(go.Shape, "Rectangle",  // this is the resized object
            { name: "SHAPE", fill: "#F1F1F1", stroke: null, strokeWidth: 4 },
            new go.Binding("fill", "isHighlighted", function(h) { return h ? "#D6D6D6" : "#F1F1F1"; }).ofObject(),
            new go.Binding("desiredSize", "size", go.Size.parse).makeTwoWay(go.Size.stringify)),
          $(go.Placeholder,
            { padding: 12, alignment: go.Spot.TopLeft }),
          $(go.TextBlock,  // this TextBlock is only seen when the swimlane is collapsed
            { name: "LABEL",
              font: "15px Lato, sans-serif", editable: true,
              angle: 90, alignment: go.Spot.TopLeft, margin: new go.Margin(4, 0, 0, 2) },
            new go.Binding("visible", "isSubGraphExpanded", function(e) { return !e; }).ofObject(),
            new go.Binding("text", "text").makeTwoWay())
        )  // end Auto Panel
      );  // end Group

    load();

      // Set up a Part as a legend, and place it directly on the diagram
    myDiagram.add(
      $(go.Part, "Table",
        { position: new go.Point(300, 10), selectable: false },
        $(go.TextBlock, "Key",
          { row: 0, font: "700 14px Droid Serif, sans-serif" }),  // end row 0
        $(go.Panel, "Horizontal",
          { row: 1, alignment: go.Spot.Left },
          $(go.Shape, "Rectangle",
            { desiredSize: new go.Size(10, 10), fill: '#CC293D', margin: 5 }),
          $(go.TextBlock, "Halted",
            { font: "700 13px Droid Serif, sans-serif" })
        ),  // end row 1
        $(go.Panel, "Horizontal",
          { row: 2, alignment: go.Spot.Left },
          $(go.Shape, "Rectangle",
            { desiredSize: new go.Size(10, 10), fill: '#FFD700', margin: 5 }),
          $(go.TextBlock, "In Progress",
            { font: "700 13px Droid Serif, sans-serif" })
        ),  // end row 2
        $(go.Panel, "Horizontal",
          { row: 3, alignment: go.Spot.Left },
          $(go.Shape, "Rectangle",
            { desiredSize: new go.Size(10, 10), fill: '#009CCC', margin: 5 }),
          $(go.TextBlock, "Completed",
            { font: "700 13px Droid Serif, sans-serif" })
        )  // end row 3
      ));

  }  // end init

  // Show the diagram's model in JSON format
  function save() {
    document.getElementById("mySavedModel").value = myDiagram.model.toJson();
    myDiagram.isModified = false;
  }
  function load() {
    myDiagram.model = go.Model.fromJson(document.getElementById("mySavedModel").value);
    myDiagram.delayInitialization(relayoutDiagram);
  }
</script>
</head>
<body onload="init()">
<div id="sample">
  <h3>GoJS Kanban Board</h3>
  <div id="myDiagramDiv" style="border: solid 1px gray; width:100%; height:500px;"></div>
  <p>A Kanban board is a work and workflow visualization used to communicate the status and progress of work items. Click on the color of a note to cycle through colors.</p>
  <p>
    This design and implementation were adapted from the <a href="swimLanesVertical.html">Swim Lanes (vertical)</a> sample.
    Unlike that sample:
    <ul>
      <li>there are no Links</li>
      <li>lanes cannot be nested into "pools"</li>
      <li>lanes cannot be resized</li>
      <li>the user cannot drop tasks into the diagram's background</li>
      <li>all tasks are ordered within a single column; the user can rearrange the order</li>
      <li>tasks can freely be moved into other lanes</li>
      <li>lanes are not movable or deletable</li>
    </ul>
  </p>
  <button id="SaveButton" onclick="save()">Save</button>
  <button onclick="load()">Load</button>
  Diagram Model saved in JSON format:
  <br />
  <textarea id="mySavedModel" style="width:100%;height:300px">
{ "class": "go.GraphLinksModel",
  "nodeDataArray": [
{"key":"Problems", "text":"Problems", "isGroup":true, "loc":"0 23.52284749830794" },
{"key":"Reproduced", "text":"Reproduced", "isGroup":true, "color":"0", "loc":"109 23.52284749830794" },
{"key":"Identified", "text":"Identified", "isGroup":true, "color":"0", "loc":"235 23.52284749830794" },
{"key":"Fixing", "text":"Fixing", "isGroup":true, "color":"0", "loc":"343 23.52284749830794" },
{"key":"Reviewing", "text":"Reviewing", "isGroup":true, "color":"0", "loc":"451 23.52284749830794"},
{"key":"Testing", "text":"Testing", "isGroup":true, "color":"0", "loc":"562 23.52284749830794" },
{"key":"Customer", "text":"Customer", "isGroup":true, "color":"0", "loc":"671 23.52284749830794" },
{"key":-1, "group":"Problems", "category":"newbutton",  "loc":"12 35.52284749830794" },
{"key":1, "text":"text for oneA", "group":"Problems", "color":"0", "loc":"12 35.52284749830794"},
{"key":2, "text":"text for oneB", "group":"Problems", "color":"1", "loc":"12 65.52284749830794"},
{"key":3, "text":"text for oneC", "group":"Problems", "color":"0", "loc":"12 95.52284749830794"},
{"key":4, "text":"text for oneD", "group":"Problems", "color":"1", "loc":"12 125.52284749830794"},
{"key":5, "text":"text for twoA", "group":"Reproduced", "color":"1", "loc":"121 35.52284749830794"},
{"key":6, "text":"text for twoB", "group":"Reproduced", "color":"1", "loc":"121 65.52284749830794"},
{"key":7, "text":"text for twoC", "group":"Identified", "color":"0", "loc":"247 35.52284749830794"},
{"key":8, "text":"text for twoD", "group":"Fixing", "color":"0", "loc":"355 35.52284749830794"},
{"key":9, "text":"text for twoE", "group":"Reviewing", "color":"0", "loc":"463 35.52284749830794"},
{"key":10, "text":"text for twoF", "group":"Reviewing", "color":"1", "loc":"463 65.52284749830794"},
{"key":11, "text":"text for twoG", "group":"Testing", "color":"0", "loc":"574 35.52284749830794"},
{"key":12, "text":"text for fourA", "group":"Customer", "color":"1", "loc":"683 35.52284749830794"},
{"key":13, "text":"text for fourB", "group":"Customer", "color":"1", "loc":"683 65.52284749830794"},
{"key":14, "text":"text for fourC", "group":"Customer", "color":"1", "loc":"683 95.52284749830794"},
{"key":15, "text":"text for fourD", "group":"Customer", "color":"0", "loc":"683 125.52284749830794"},
{"key":16, "text":"text for fiveA", "group":"Customer", "color":"0", "loc":"683 155.52284749830795"}
],
  "linkDataArray": []}
  </textarea>
</div>
</body>
</html>